most people I know will only accept this when someone is literally dying and rotting with a terminal illnesses. the only ones that are opposed to it are deeply religious people.
Also, there's absolutely no point in talking about this with internet pro-lifers, they only try to talk you out of this (or send the cops to your home) to feel better about themselves and their extreme views on life. something similar can be said about psychologists/psychiatrists, but they will lock you up because letting you kill yourself will look bad on them.
having a conversation about this topic, at least in real life, is extremely hard for me. even if I would really like to express these feelings verbally, there's no one in my life who will take this in a neutral way, and I don't want to burden them with this information anyway. I can only imagine what it would feel like if a beloved friend or family member tells you that they intend to die at any moment. I'm extremely pro-choice in every way, and I would understand if someone told me this, but it would still crush me.
Not to say that people who accept this don't exists, but they are extremely rare. This is a secret that most of us have to keep and take to our grave, sadly.